package Java.CompleTable;

import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;

//异步回调
public class CompletableFutureDemo {
    public static void main(String[] args) throws ExecutionException, InterruptedException {
        //异步调用，没有返回值
        CompletableFuture<Void> completableFuture1 = CompletableFuture.runAsync(() -> {
            System.out.println(Thread.currentThread().getName() + " completableFuture1");
        });
        completableFuture1.get();

        //异步调用有返回值
        CompletableFuture<Integer> completableFuture2 = CompletableFuture.supplyAsync(() -> {
            System.out.println(Thread.currentThread().getName() + " completableFuture2");
            //模拟异常
            int i = 1 / 0;
            return 1024;
        });

        completableFuture2.whenComplete((t, u) -> {
            System.out.println("----t=" + t);    //返回值
            System.out.println("-----u=" + u);    //异常

        }).get();
    }

}
